sufficiency

UK: /səˈfɪʃənsɪ/ US: (sə fish′ən sē)

Inflections of 'sufficiency' (n): npl: sufficiencies

WordReference Random House Unabridged Dictionary of American English © 2026

suf•fi•cien•cy  (sə fish′ən sē), n. 

1. the state or fact of being sufficient;
   adequacy.
2. a sufficient number or amount;
   enough.
3. adequate provision or supply, esp. of wealth.

• Late Latin sufficientia; see sufficient, -ency
• 1485–95

Collins Concise English Dictionary © HarperCollins Publishers::

sufficiency / səˈfɪʃənsɪ/ noun ( -cies)

1. the quality or condition of being sufficient
2. an adequate amount or quantity, as of income
3. efficiency

WordReference Random House Learner's Dictionary of American English © 2026

suf•fi•cient /səˈfɪʃənt/   adj. 

1. enough for what is needed:
   There are barely sufficient funds for the project.

suf•fi•cien•cy, n. [uncountable]
suf•fi•cient•ly, adv.: 

sufficiently informed about the issues.

WordReference Random House Unabridged Dictionary of American English © 2026

suf•fi•cient  (sə fish′ənt), adj. 

1. adequate for the purpose;
   enough:
   sufficient proof; sufficient protection.
2. Philosophy [Logic.] (of a condition) such that its existence leads to the occurrence of a given event or the existence of a given thing. Cf. necessary (def. 4c).
3. [Archaic.] competent.

• Latin sufficient- (stem of sufficiēns), present participle of sufficere to suffice, equivalent. to suf- suf- + -fici-, present stem of -ficere, combining form of facere to make, do¹ + -ent- -ent
• Middle English 1350–1400

suf•fi′cient•ly, adv. 
Antonyms

• 1. meager, scant, inadequate.